Propeller



April 26,- 1927, W w. PAGE? PROPELLER Filed May 11 1925 JMmtot M 6:7-

I dicates the hub of a Patented Apr. 26, 1927. V I

UNITED STATE Wm WITEEBS PAGEID, OF VIRGINIA CITY, NEVADA.

PROPELLER.

Application filed May 11,

This invention relates to propellers and more particularly to airplane propellers. An object of my invention is the provision of an airplane propeller which may be rotated by 5 means of the reactions effected by passing a fluid medium through the blades of the propeller. The fluid medium may be under pressureor may have a temperature above the temperature of the surrounding air, or both. Such medium may be, for example, any gaseous substance, such, for example, as steam, or the products of combustion of an internal combustion. motor. Although the propeller of my invention may be rotated by the action of a fluid medium in a properly constructed propeller, an internal combustion motor may be also .used in turning the propeller if desired. I

Another object of my invention is the provision of a propeller wherein the fluid medium is not immediately allowed to enter the open air but is first led into passageways in the propeller blades, these passageways extending from the leading to the trailing edges of the blades.

A further object of my invention is the provision of longitudinal passageways in the blades of a propeller, through which passageways a gaseous medium may pass, an ducts inclined to the line of flight through which the gaseous medium may pass into lateral pamageways extending from the leadin to the trailing edges of the propeller bla es.

With the foregoing objects. in view, together with such other objects and advantages as may subse%uently appear, this invention resides in t e construction and arrangement of parts hereinafter described and claimed, and illustrated in the accompanying drawings, in which:

Figure 1 is aplan view'showing the lower blade of the propeller partly cut away to a plane indicated by the line H of Figure 2, and showing the upper blade of the propeller cut away tot e plane indicated by the line bb' of Figure 2; and y a Figure 2 is a section ken on the line 2-2 of Figural.

Referring to the drawings for a more detailed description thereof, the numeral '5 in- ]iropeller havin a central aperture 6 for t e reception 0 a pro-' peller shaft, In -radial relation to the hub 5 are the propeller blades 7 and 8 having respectivelyleading edges9 and trailing edges 1926.- Serial No. 108,332.

10, the propeller being intended to rotate in the direction of the arrow 12 shown on the blades and are disposed below the. lougitudinal ducts 15 which preferably are disposed adjacent the leading edges of the blades. The passageways 17 are preferably disposed parallel to the chords of the blades. Tapered ducts 19 connect the longitudinal ducts 15 with the passageways 17 The 'ducts 19 are disposed at an angle to the line offlight, and extend rearwardly from the ducts 15 in the passageways 17.

The medium employed in the propeller may be led into the passageway 16 of the hub in any well known manner and passes into the ducts 15 of the blades. The medium passes outfrom the ducts 15 into the ducts 19 and from-the latter into the passageways 17 and out from the latter at the trailing d edges of the blades.

It will be'observed that the air passes in the direction of the arrow 21 into the passageways 17, and the air in these passageways is entrained by the medium ejected from the ducts 19 and forced outwardly through the trailing edges of the blades. Due to the various actions occurring, a low pressure area is created on the leading edges of the blades and a pressure is built up on the trailing edges of the blades so that the.

propeller is rotated.

While I have described one embodiment of my invention, modifications thereof may be readily devised without departing from the spirit of my invention, and it is to be understood that such modifications come within the scope of the appended claims. 7 I claim: I i p 1. In a propeller, radially related blades each having therein a longitudinal duct and lateral passageways leading from the leading to the trailing edge of each blade and ducts leading'trom the longitudinal duct of each blade to the correspondin'glateralpassageways,- said lateral passageways being open to the atmosphere.

2. In a propeller, radially related blades 3 each having therein a longitudinal duct and lateral passageways leading from the leadingto the trailing edge of each blade and .dnctsleading from the longitudinal duct of each blade to the corresponding lateral passageways, the last mentioned ducts coinmunicating with the lateral passageways at points rearwardlyvof the longitudinal pas sageway, said lateral passageways being open to the atmosphere.

3. In a propeller, radially related blades each having therein a longitudinal ductand lateral pa;-'sageways leading from the leadpoints rearwardly of the longitudinal passageway and at an angle to the line of flight of a plane carrying the propeller, said lateral passageways being open to the atlateral passageways leading from the lead ing to the trailing edge of each blade and ducts leading from the longitudinal duct of each blade to the corresponding lateral passageways, the last mentioned ducts being direi-tedat an angle to the line of flight of: .a plane carrying the propeller, said lat eral passageways being open to the atmosphere.

WIN WITHERS PAGE'T. 

